insert_caption

Insert a caption paragraph after the specified paragraph.

SERVERDocx SOURCEsecurityronin/docx-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/securityronin-docx-mcp/insert-caption.md

WHAT IT DOES

What insert_caption does on Docx

AI agents use insert_caption to create or update resources in Docx, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Docx environment.

RISK

Why insert_caption is rated Medium

This tool creates and adds new caption content to a Word document, which is a reversible modification. It does not execute arbitrary code, delete data, move money, or have destructive effects. The action is limited to inserting a single caption element, making it a Write operation with low severity since captions are typically cosmetic document elements with minimal blast radius.

From the tool's definition Tool name 'insert_caption' and description 'Insert a caption paragraph after the specified paragraph' indicate creation of new content within a document.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs insert_caption safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Docx, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For insert_caption, this is the rule to start with:

insert_caption Rate-limited

insert_caption stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "insert_caption": {
      "limits": [
        {
          "counter": "insert_caption_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Docx, apply this rule, and every insert_caption call is checked against it from then on.

FAQ

Questions about insert_caption

What does the insert_caption tool do? +

Insert a caption paragraph after the specified paragraph. It is categorised as a Write tool in the Docx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on insert_caption? +

Register the Docx MCP server in PolicyLayer and add a rule for insert_caption: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Docx. Nothing to install.

What risk level is insert_caption? +

insert_caption is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit insert_caption? +

Yes. Add a rate_limit block to the insert_caption rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block insert_caption completely? +

Set action: deny in the PolicyLayer policy for insert_caption. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides insert_caption? +

insert_caption is provided by the Docx MCP server (securityronin/docx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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